Well, a brand new member of Passions ...
I totally agree with you about the animals, but humans are accustomed to using their voices to express themselves, with nonverbal communication often subconscious. As an observer of that nonverbal language, do you think your interpretation would be very different from anothers? As an example, when I am tired, and sitting, I bounce my leg using the ball of my foot. I've done this since I was a child (I think I'm trying to keep myself awake). If others who did not know me, and saw me exhibiting this behavior, they would probably think I was anxious. So, can we only trust universally understood nonverbal actions, such as a nod, a hug, shaking the head side-to-side for "no", smiles, frowns, etc.?
the poet's pen...gives to airy nothing
A local habitation and a name ~ Shakespeare